EP 0802331 A1 19971022 - Fluid pressure cylinders provided with impact absorbing mechanisms
Title (en)
Fluid pressure cylinders provided with impact absorbing mechanisms
Title (de)
Fluiddruckzylinder mit Schlagdämpfungsvorrichtungen
Title (fr)
Cylindres pour fluid sous pression avec mécanismes d'absorbtion des chocs
Publication
Application
Priority
- JP 9659696 A 19960418
- JP 9659796 A 19960418
- JP 16160896 A 19960621
- JP 16325296 A 19960624
- JP 22142496 A 19960822
Abstract (en)
A fluid pressure cylinder (1) includes a cylinder body (2), a piston (9) accommodated in the cylinder body (2) to define first and second pressure chambers (10, 11) therein, means for supplying fluid to each chamber (10, 11) to reciprocate the piston (9) between a first stroke end and a second stroke end, first and second bumper surfaces (B), an annular cushion retainer (23, 24) connected to the first bumper surface, and an elastomeric cushion (25) for deforming and cushioning an impact produced when the piston reaches the first stroke end. The bumper surfaces (B) approach each other when the piston (9) reaches the first stroke end and separate from one another when the piston (9) moves toward the second stroke end. The cushion (25) has a shape corresponding generally to a hollow conical section. The cushion (25) includes a base section (E1) retained by the cushion retainer and a buffer section (E2) joined to the base section (E1). The buffer section (E2) has an outer surface for contacting the second bumper surface and an inner surface that faces the first bumper surface. The outer surface forms a circular seal with the second bumper surface when the piston (9) approaches the first stroke end. The cushion (25) is flexed such that the buffer section (E2) moves toward the first bumper surface. The buffer section (E2) moves away from the first bumper surface when the piston (9) moves towards the second stroke end. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 15/22 (2006.01)
CPC (source: EP KR US)
F15B 15/22 (2013.01 - KR); F15B 15/226 (2013.01 - EP US)
Citation (search report)
- [XA] GB 1401126 A 19750716 - MOSIER IND INC
- [XA] US 5224413 A 19930706 - HERNER RAY H [US]
- [XA] DE 4134063 A1 19930422 - FESTO KG [DE]
- [XA] WO 9014520 A1 19901129 - MECMAN AB [SE]
- [A] US 3961564 A 19760608 - RICH BELDON R, et al
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0802331 A1 19971022; EP 0802331 B1 20020206; DE 69710244 D1 20020321; DE 69710244 T2 20021017; KR 100244081 B1 20000302; KR 19980018084 A 19980605; US 5850776 A 19981222
DOCDB simple family (application)
EP 97302594 A 19970416; DE 69710244 T 19970416; KR 19970014135 A 19970417; US 83850697 A 19970408